Fitting The Appliance - Baxi Boston 2 80 OF Installation And Servicing Instructions

Fitting the Appliance - Page 5
PREPARATION
1) A sound and level floor which conforms to the
requirements of the Local Authorities and Building
Regulations must be provided.
2) Select the most suitable position for the boiler taking
due account of any clearances required for the safe
and proper functions of the boiler and its associated
controls.
3) Manoeuvre the boiler into position so that the two
spacer pips on the rear of the draught diverter touch the
wall.
4) Connect the water flow and return pipes (see Boiler
Connections).
5) Connect the flue pipe, making sure that the flue trim is
placed in position before the final connection is made.
6) Complete the gas connection to the boiler.
7) Partially fit the outer case.
8) Connect the electrical supply
(see Electrical Connections).
9) Complete the installation (see Commissioning the Unit).
10) Complete the assembly of the outer case.
BOILER CONNECTIONS (Fig 3)
The boilers have 5 water connections:
2 x Rp1 (1 in BSP internal) return connections.
2 x Rp1 (1 in BSP internal) flow connections.
1 x Rp ¾ ( ¾ in BSP internal) flow connection.
The 1 x Rp ¾ ( ¾ in BSP internal) flow connection is for use
when the pump is fitted inside the outer case. For other
installations this connection must be plugged.
THE WATER SPREADER MUST BE FITTED TO THE
PUMPED RETURN CONNECTION ON ALL
INSTALLATIONS. THE MARKS ON THE SPREADER
MUST BE BETWEEN THE TWO MARKERS ON THE
COMBUSTION CHAMBER (Fig 4).
WARNING: Overtightening of the water spreader may
damage the heat exchanger. Do not apply excessive
amounts of sealing tape to the thread of the spreader.
The spreader has one mark on the 80, 70 and has two
marks on the 60, 50, 40.
When installing the pipework ensure that:
a) Suitable union fittings are used at the first joint of all
boiler connections.
b) The pipework will run through the cutouts provided in
the outer case (Fig 2).
c) Drain off points are provided as appropriate.
d) Pipe sizes are suitable for the system design.
Pump (Fig 1)
A suitable pump e.g. Grundfos UPS 15-50, 15-60 or
equivalent Myson or Wilo with ball type isolating valves and
22mm compression fittings may be fitted inside the outer
case.
The pump should be connected to the ¾ in flow connection
on the front of the heat exchanger using the following
standard fittings.
A - 1 off - Elbow 3/4 BSP male x 3/4 BSP female
B - 1 off - Conex straight connector 3/4 BSP male
x 22mm copper
C - 3 off - 22mm Yorkshire elbows
D - 1 off - when installing the 60, 50 and 40
60mm long - 22mm copper tube
D - 1 off - when installing the 80 and 70
92mm long - 22mm copper tube
E - 1 off - 100mm long - 22mm copper tube
F - 1 off - 145mm long - 22mm copper tube
G - 1 off - 42mm long - 22mm copper tube
The redundant flow connection(s) must be plugged.
Accuracy is important to avoid the pump and or pipework
obstructing removal of the top panel of the combustion
chamber, or fouling the top panel of the outer case.
OUTER CASE (Fig 6)
Assemble the outer case in the following manner:
1) Locate the RH side panel over the pegs at the RH side
of the base and press downwards to secure. When
fitting the panels if access is restricted the cutouts at
the top of the back edge of the panels can be used to
pass the case fixing brackets.
2) Secure the panel to the case fixing brackets with two of
the six screws provided.
3) Repeat 1 & 2 with the LH side panel.
4) Secure the hinges of the facia panel to the two side
panels using two of the six screws provided.
5) At this point the electrical connections to the facia panel
can be made and the appliance can be commissioned.
(See 'Electrical Connections' and 'Commissioning the
Appliance').
6) Swing the facia panel upwards and secure to the side
panels using the two screws retained to the control
facia.
7) Lift trim clear of flue connection on the boiler and locate
the top panel on the top of the side panels and press
down to secure. Re-position the trim in the cutout on
the top panel.
8) Hook the bottom edge of the front panel over the lugs
on the base and swing the top edge back till the pegs at
the top of the panel locate in the corresponding holes.
Press to secure.
GAS CONNECTION (Fig 3)
Adapt the gas supply 15mm ( ½ in BSP) within the outer case
making the gas connection to the service tap provided.